66412275317 has 4 divisors (see below), whose sum is σ = 67956746880. Its totient is φ = 64867803756.

The previous prime is 66412275277. The next prime is 66412275323. The reversal of 66412275317 is 71357221466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71357221466 = 2 ⋅35678610733.

It is a cyclic number.

It is not a de Polignac number, because 66412275317 - 2¹⁰ = 66412274293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66412275337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772235717 + ... + 772235802.

It is an arithmetic number, because the mean of its divisors is an integer number (16989186720).

Almost surely, 2^66412275317 is an apocalyptic number.

It is an amenable number.

66412275317 is a deficient number, since it is larger than the sum of its proper divisors (1544471563).

66412275317 is a wasteful number, since it uses less digits than its factorization.

66412275317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544471562.

The product of its digits is 423360, while the sum is 44.

The spelling of 66412275317 in words is "sixty-six billion, four hundred twelve million, two hundred seventy-five thousand, three hundred seventeen".